Level 1

Error code 910026A and 95881

I am receiving these codes when I am submitting my return.  I have all my tax-exempt income entered as I worked on a reserve.  It talks about filling out a T90 form but it is filled out.  All it consists of is my tax-exempt employment income.  My T4 has a box71 which seems like I have to enter it.  (Seen discussions where you don't enter it)  If I don't enter it I get an error on my t4 to fix.